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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7429853 | Series resonant circuit and voltage stabilizing method thereof A series resonant circuit device and a voltage stabilizing method thereof are provided. The series resonant circuit device includes a resonant circuit having at least a resonant capacitor and a resonant inductor, an equivalent capacitor electrically coupled to the r... | 09/30/2008 |
| 7264006 | Ozonated water flow and concentration control apparatus and method The invention features an apparatus and a method for supplying ozonated water to more than one process tool. Ozonated water of a first concentration received from an ozonated water generator and water received from a source are mixed to produce ozonated water of a s... | 09/04/2007 |
| 7166853 | Active method and system of establishing electrical contact A system for electrically contacting a semiconductor wafer during implanting of the wafer includes one or more pairs of closely spaced contacts located adjacent the semiconductor wafer and a driving circuit connected to the contacts to provide a discharge from one c... | 01/23/2007 |
| 7133298 | High frequency voltage regulating transformer based converter A switching regulator and method of fabricating a switching regulator is disclosed. In one embodiment a switching regulator comprises a transformer having a primary winding and a secondary winding, an inductor (L) connected to an input of the primary winding, and a ... | 11/07/2006 |
| 7113065 | Modular inductor for use in power electronic circuits A modular inductor arrangement is provided in which a footprint of an enclosure for single or multiple phase inductors provides enhanced thermal transfer. The inductor coil may be wound about an axis generally parallel to a mounting surface of the package, so as to ... | 09/26/2006 |
| 7023193 | Elimination of potential transformer in ANSI Type A voltage regulator An ANSI Type A voltage regulator that eliminates the need for a potential transformer is disclosed. A control unit finds an output voltage by constantly monitoring the input voltage across the utility windings and the stored tap position. The value of the output vol... | 04/04/2006 |
| 6914350 | Switching arrangement A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty module... | 07/05/2005 |
| 6882125 | Motor controller with position detector A motor controller includes a motor-position detector, a motor driver and a power cable having a pair of electric lines (two lines) which feeds power from the driver to the detector. The detector superimposes serial information about the motor-position to the power ... | 04/19/2005 |
| 6670063 | Fuel cell system In the fuel cell (FC) system comprising a FC and a rechargeable battery, a demand power of the FC is calculated by subtracting the charge power to the battery from a demand power signal which indicates the demand value of a load current and using the resu... | 12/30/2003 |
| 6404176 | Push-pull auto transformer A DC-DC voltage converter comprises a controller, two switches, a transformer and two rectifying diodes. The transformer has a first winding, a second winding and a center tap. Input voltage in connected between the center tap and ground. An anode of each... | 06/11/2002 |
| 6388430 | Buck regulator circuit for use in a power supply The present invention provides a modified buck regulator circuit capable of providing two output voltage levels. The circuit includes an inductive element connected between the input and output of the circuit. Further, the circuit includes an auto-transfo... | 05/14/2002 |
| 5895979 | Power distribution network incorporating a voltage support transformer and process of use A power distribution network including a voltage support transformer is disclosed which uses the fault current from a line of the power distribution network in which a fault condition exists to support or stabilize the voltage across one or more other lin... | 04/20/1999 |
| 5670848 | Light monitoring system A series-fed light monitoring system, used for example for runway lights at airports, and fed by a low-frequency feeding current, comprises at least one series loop having one or more loading points connected in series in the form of fittings with lamps o... | 09/23/1997 |
| 5528110 | Apparatus for control of load power consumption An improved voltage reduction apparatus specifically designed to overcome implementation problems of a prior art voltage reduction apparatus. The present invention is designed to overcome the problem of magnetic field flux induced harmonic distortion and ... | 06/18/1996 |
| 4803609 | D. C. to D. C. converter A d.c. to d.c. converter system converts a d.c. signal into a pulsating a.c. signal, which is applied to the primary of a power transformer. A transformer in which the primary and secondary windings are planar is employed to generate the output pulse sign... | 02/07/1989 |
| 4336490 | Voltage sensing apparatus for a voltage regulating transformer An automatic voltage regulating transformer is provided which incorporates a potential transformer electrically disposed across its series windings, and a set of sensing windings disposed across its shunt windings to provide a voltage sensing network whic... | 06/22/1982 |
| 4273051 | Electric device An electrically ignited load such as a fusehead is connected to the secondary winding of a transformer. The secondary winding is magnetically linked to a primary winding through a magnetic circuit and the transformer is constructed so as to provide a subs... | 06/16/1981 |
| 4038595 | Self-exited high-frequency generator A self exited frequency generator including a parallel resonant circuit with the inductive portion of the resonant circuit comprising a high frequency current transformer in which, in order to match the load with the oscillator tube a slidable ferrite cor... | 07/26/1977 |
| 4016452 | Lamp ballast circuit Starting and operating ballast circuit for gaseous discharge lamp. Ballast winding comprises a pair of series connected coils each having a portion with a selected number of turns thereof connected in a high voltage starting circuit including a discharge ... | 04/05/1977 |
